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High-throughput membrane surface modification to control NOM fouling.

Mingyan Zhou1, Hongwei Liu, James E Kilduff

  • 1Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.

Environmental Science & Technology
|June 24, 2009
PubMed
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Researchers developed a fast, scalable method using high-throughput platform (HTP) and photoinduced graft polymerization (PGP) to create fouling-resistant membrane surfaces. This approach identifies effective materials for reducing natural organic matter (NOM) fouling in water treatment.

Area of Science:

  • Membrane Science and Technology
  • Polymer Chemistry
  • Water Treatment

Background:

  • Membrane fouling by natural organic matter (NOM) significantly reduces water treatment efficiency.
  • Developing fouling-resistant membrane surfaces is crucial for sustainable water purification.
  • Existing methods for surface modification and screening can be time-consuming and costly.

Purpose of the Study:

  • To develop a novel, high-throughput method for synthesizing and screening fouling-resistant membrane surfaces.
  • To identify effective monomers for creating poly(aryl sulfone) membranes resistant to NOM fouling.
  • To compare the efficacy of different surface chemistries against NOM and protein fouling.

Main Methods:

  • Combined high-throughput platform (HTP) with photoinduced graft polymerization (PGP) for membrane surface modification.

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  • Synthesized and screened a library of 66 monomers on poly(ether sulfone) (PES) membranes.
  • Evaluated NOM resistance using adsorption assays followed by pressure-driven filtration.

    • Main Results:

    • Identified novel and previously known low-fouling surfaces for NOM.
    • Zwitterionic and amide-containing monomers demonstrated superior fouling resistance.
    • Bench-scale studies confirmed the scalability of the HTP-PGP method.
    • Compared the mitigation of NOM and bovine serum albumin (BSA) fouling.

    Conclusions:

    • The developed HTP-PGP method is inexpensive, fast, simple, reproducible, and scalable.
    • New membrane chemistries effective against NOM fouling were identified.
    • This approach offers significant opportunities for selecting advanced membrane materials for water treatment.